The XTi 201 can be used in both AC and DC modes for TIG and MMA welding allowing the welding of virtually any metal. Square Wave AC output and power pulsing maximise productivity while reducing heat input. In DC Mode the majority of steels can be welded quickly using the pulse power function to reduce the heat input. Ac allows the welding of Aluminium and Magnesium alloys. The Square Wave output and adjustable cleaning maximise the arc energy offering high welding speeds.